William g



w. e, WOOD.

FOCUSING DEVICE.

APPLICATION FILED SEPT.23, I920.

Patented May 16, 1922.

, INVENTOI. W G'- Wood BY am! ATTORNEY UNITED STATES PATENT 1 OFFICE.

WILLIAM G, WOOD, OF SAN FRANCISCO, CALIFORNIA, ASSIG-NOR TO BERKELEYLIGHT CORPORATION, OF SAN FRANCISCO, CALIFORNIA, A. CORPORATION 01?NEVADA.

FOCUSI'NG DEVICE.

Specification of Letters Patent. Patented luay 16, 1922.

Application filed September 23, 1920. Serial No. 412,264.

T 0 @ZZ whom it may concern:

Be it known that I, lViL-LIAM G. Woon, a citizen of the United States,residing at San Francisco, in the county of San 1 rancisco and State ofCalifornia, have invented new and useful Improvements in FocusingDovices, of which the following is a specifica- This invention relatesto headlights and projectors and more particularly to a support for thesocket of anincandescent lamp whereby the lamp may be universallyadjusted with relation to the reflector, The object is to simplify andimprove the construction and operation of a device of this character.

Two forms which my invention may assume are exemplified in the followingdescription and illustrated in the accompanying drawing, in which Fig. 1shows a cen tral longitudinal sectional view of a lamp embodying myinvention.

Fig. 2 shows a sectional viewoi a modified form of the same.

Referring in detail to the form shown in l ig. 1, I employ a reflector10 having an opening at its base or rear central portion in which isfitted a cylindrical boss 11 having a flared endlQ seated inside of thereflector.

This boss is held. in place by a sci;'ewthrcaded interior diameter ofthe boss so as to aflord.

suflicient space for universally adjusting the socket within, Thissocket carries a lamp 15 at its inner end and at its outer end isarranged to receive a plug (not shown) for forming an electricalconnection. The intermediate portion of the socket is screwthreaded onits exterior and is supported by an adjusting member 16 formed with acylindrical body portion screw-threaded intoriorly and a bellshapedinner end. 1'? flared or curved outwardly in the form of an are. Thishell-shaped portion of the adjusting member has its interior portionresting against the adjacent end of the boss 11. A clamping member 18 isscrew-threaded on to the exterior of the ring 1.3 and has an inturnedflange 19 to enga e the exterior of the bellshaped portion 1? and clampthe same socurely against the end of the boss. A lock nut 20 is carriedon the socket member 14 to prevent turning of the latter after. theparts are once fixed in position. In operation when the parts of thefocusing device are loosened. the socket may be moved axially in astraight line by turning the socket relatively to the adjusting member16 whereby to obtain the desired length of projection of the lamp withinthe reflector. The socket may be moved angularly in any direction toposition the lamp properly, either in or out of focus with thereflector, by reason of the arcuate or bell-shaped seat formed by theadjusting member inengagement with the boss 11. The desired position ofthe lamp having been determined and the lamp fixed in accordancetherewith, the parts are then looked in position by turning the clampingmember up against the end of the adjusting member. Thereafter the partsmay be locked against axial movement by turning the nut 20 against theadjusting member 16.

It will be noted that the parts are readily and easily assembled andremoved. When the clamp is turned off of the ring 13 the socket may bewithdrawn from its position within the boss and thereafter the boss maybe taken oil by unscrewing from the ring 13. The ring may be loose orfixed upon the re flector as desired, but in the present instance I haveshown it loosely seated against the rear of the reflector and haveillustrated depressions 21 therein which are designed to receiveprojections on a spanner wrench whereby to turn the ring or otherwisema; nipulate it for putting the parts together.

lin Fig. 2 I show the boss 11 formed integral with the reflector, andemploy a socket member 14 which is slidably connected with the adjustingmember 16. The slidable parts are fixed in adjusted position by means ofa set screw Various changes in the construction and arrangement of theseveral parts herein shown and described may be employed withoutdeparting from the spirit of my invention as disclosed in the appendedclaims.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. In a headlight or projector, a reflector having aboss arranged in its base, a lamp socket carried loosely within theboss, an adjusting member on the socket having a bell-shaped portion tofit over the end of the Q 1,415 sea boss and clamping means carried bythe re- Hector to fix the adjusting member in any desired position withreference to the boss whereby to retain the socket member in adjustedposition.

2. In a headlight or projector the combination with a reflector, anenlarged boss ar ranged at the base of the reflector, a socket looselycarried Within the boss and spaced from the walls thereof, an adjustingmember supporting the socket member and permitting axial adjustment ofthe latter, said adjusting member having a. bell-shaped end resting atits interior against the end of the boss and a clamping memberscrew-threaded on a stationary part of the reflector and pro vided Withmeans to engage the exterior of the bell-shaped end of the adjustingmember whereby to clamp the latter in adjusted position against theboss.

In a headlight or projector the combination with a reflector, anenlarged boss forming an opening in the base of the reflector, a ring onthe exterior of the reflector surrounding the boss, a socket memberarranged loosely Within, the boss and spaced from the sides thereof, anadjusting member supporting the socket member and permitting axialadjustment of the latter said adjusting member having a bell-shaped endadapted to seat at its interior against the end of the boss andpermitting the socket member to be adjusted angularly with reference tothe boss, and a clamping member screwthreaded on the exterior of thering and having a portion to engage the exterior or" the bell-shaped endof the adjustin member whereby to clamp the latter in adjusted positionupon the boss.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

WILLIAM G. WOOD Witnesses JOHN H. HERRING, W. W. HEALEY.

